plumiDiffusion: CAIE IGCSE Biology questions
Every CAIE IGCSE Biology exam question on 3.1 Diffusion, June 2024 and the specimen papers, with its mark scheme and examiner’s report.
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Calculations
Q3(a)(i)
The whole paper ↗![June 2024 Paper 3, question 3(a)(i): Calculate the mean time for all the blocks to turn yellow in test‑tube C. Give your answer to the nearest whole number. Space for working. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-03-ai-qp.webp)
Q3(a)(ii)
The whole paper ↗![June 2024 Paper 3, question 3(a)(ii): Using the results shown in Table 3.1, describe the effect of surface area on diffusion. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-03-aii-qp.webp)
Q3(a)(iii)
The whole paper ↗![June 2024 Paper 3, question 3(a)(iii): State one factor, other than surface area, that could affect diffusion in this investigation. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/061031-jun24-03-aiii-qp.webp)
Q3(a)(iv)
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Q1(a)(i)
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Q1(a)(ii)
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Q1(a)(iii)
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Q1(b)(i)
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Q1(b)(ii)
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Q1(b)(iii)
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All 14 questions on Diffusion, as a list
- June 2024, Paper 1, Q7 (1 mark): The diagram shows a section through an alveolus and through a capillary. wall of the alveolus air red blood cells capillary wall capillary X Y NOT TO low carbon
- June 2024, Paper 1, Q8 (1 mark): In which row will the diffusion of ions into a cell be the quickest? ion concentration ion concentration surface area of width of in the external in the cell th
- June 2024, Paper 3, Q3(a)(i) (2 marks): Calculate the mean time for all the blocks to turn yellow in test‑tube C. Give your answer to the nearest whole number. Space for working. [2]
- June 2024, Paper 3, Q3(a)(ii) (1 mark): Using the results shown in Table 3.1, describe the effect of surface area on diffusion. [1]
- June 2024, Paper 3, Q3(a)(iii) (1 mark): State one factor, other than surface area, that could affect diffusion in this investigation. [1]
- June 2024, Paper 3, Q3(a)(iv) (3 marks): Complete the sentences to describe how the acid particles diffuse to cause the colour change. The acid particles move from the acid solution into the , down a g
- June 2024, Paper 6, Q1(a)(i) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(a)(ii) (3 marks): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(a)(iii) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(b)(i) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(b)(ii) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- June 2024, Paper 6, Q1(b)(iii) (1 mark): Cooking fruit and vegetables in water reduces their vitamin C content. The vitamin C is transferred from the fruit and vegetables to the water by diffusion. DCP
- Specimen, Paper 1, Q7 (1 mark): How do carbon dioxide and oxygen move into and out of a mesophyll cell? A active transport B diffusion C osmosis D transpiration
- Specimen, Paper 2, Q5 (1 mark): How do carbon dioxide and oxygen move into and out of a mesophyll cell? A active transport B diffusion C osmosis D transpiration
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